solar system that charges batteries in 4 is impossibe ?

[gendil]

impressive man ....nice pictures ....nice system ...now you have remind me of important question

despite the fact that i know how to calculate solar system (pwm/mppt) and make all necessary calculations


but i still 0 in terms of "PROTECTION DEVICES" i really connect my pv directly to my batteries "my home system has 200 amper battery"

with no protection at all?

and i connect my batteries to my loads directly with out any sort of protection


can you educate me abit about protection devices ...this will allow me to install systems for my friends

i refuse to service them because i really dont know how to protect them and thier systems if some thing gone wrong

..thanks friend and i congratulate you on your impressive system

[SunEagle]

wow impressive ...mobile solar station...i will make sure i buy this barrow ...the system i show you i used when i go in picnic and i use in home as well...but in my home i rely on my

'abit big ' system...it is 200 amper battery with 250 watt ...panels ...but its nice to have small system on mobile wheels ...the batteries are incredible heavy

and the wheel will be of grerat help

I also have "big" portable system. It includes a 12v 200Ah battery system, about 420watts of panels (3 x 80 & 2 x 90), 30 amp PWM CC, 600 watt inverter.

Here are a few pictures of that one. Although it only shows 4 panels but the combiner box was designed for 5.

I spent about $2500 for this system and could have saved $1000 by going with 2 x 6v 232Ah FLA batteries instead of 4 x 12v 50Ah, and 2 x 200 w panels instead of the 5 < 100w.

Big mistake to build the system like I did but again I did not listen to the experts on this forum before I purchased that hardware.

[gendil]

wow impressive ...mobile solar station...i will make sure i buy this barrow ...the system i show you i used when i go in picnic and i use in home as well...but in my home i rely on my

'abit big ' system...it is 200 amper battery with 250 watt ...panels ...but its nice to have small system on mobile wheels ...the batteries are incredible heavy

and the wheel will be of grerat help

[SunEagle]

For a 65Ah FLA battery the highest charging current would be around 8 amps. That probably equates to a 150watt panel with a Vmp ~ 18volts and Imp ~ 8.3amps.

My small system uses a 65Ah Optima battery but because I did not follow the advice of people on this forum I only purchased an 80watt panel. It is on the "light" side for charging that battery with an Imp ~ 4.5 amps. I should have gotten at least a 100watt panel or even better a 120watt panel.

Here are a couple of pics of my system.

[gendil]

the problem is that i am getting addictive with these things ...all my bucks are going to (panels batteries pwm controlleres etc) hehehehhe

here is small system that i use for laptop + led lamp + phone charger ....65amper sla + 60 watt panel (18vmp+3.25 a maxim power )+souer pwm controller 24/12volt 5 amper


i wonder the what is largest (panel) this system can accept before my battery (gets angrey with large charging current)??????

this time its SLA BATTERY

[SunEagle]

i am living in the middle of libya hehehe

Then you are ahead of the game with a lot of great sunlight for pv.

[gendil]

i am living in the middle of libya hehehe

[SunEagle]

a research done by the nothinghamm university in uk shows that libya can produce 5 times money in solar than in oil
and it has the incridible 7 kwh a day per squar meter on flat panel

the research is here mr butche dealer

http://www.csers.ly/en/news/30-libyan-solar

so it seems that 250 watt panel can produce 300 watt hehehe

thanks mr brian for your more PRODUCTIVE answer

...on the same research they mention the word "7kwh per day in square meter in flat panel"

can that mean flating my solar panel??

looks like it the same trick you already mention to me mr brian ? flating the panel will allow me to harvest alot of power


thanks bcroe ...seem good solution a ABIT risky due to increase in charging current

You would need a pretty big extension cord from Libya to charge your batteries.

[gendil]

a research done by the nothinghamm university in uk shows that libya can produce 5 times money in solar than in oil
and it has the incridible 7 kwh a day per squar meter on flat panel

the research is here mr butche dealer

http://www.csers.ly/en/news/30-libyan-solar

so it seems that 250 watt panel can produce 300 watt hehehe

thanks mr brian for your more PRODUCTIVE answer

...on the same research they mention the word "7kwh per day in square meter in flat panel"

can that mean flating my solar panel??

looks like it the same trick you already mention to me mr brian ? flating the panel will allow me to harvest alot of power


thanks bcroe ...seem good solution a ABIT risky due to increase in charging current

[bcroe]

why i am concerned with fully charging my batteries in quick time ......we are in situation of
LIFE ON ISLAND where we have to manage our power need on our own )>>>>>>>.

(note : we do have around 7 hour of sun in winter and more than 10 hours of sun in summer ...
the concern is to harvest it quickly ..charge batteires quickly ...and enjoy 2 hours of free sun
power in winter 7-5 =2 hours and enjoy 5 hours of free power in summer 10-5 =5 hours ....the
5 hour is the charging time ..

Instead of moving your panels all day every day, you might put in parallel some panels facing
east and some facing west. With some adjustment of the angle, you can have full charging
current over extra hours, instead of a big peak you can't use at noon. Here is a curve from
this summer at 42 degrees latitude of 3 panels. Note that 2 E-W panels added equal a single S
panel current at noon, but over a much broader number of hours.
PVm17Jn16.jpg

Haze and clouds will of course drastically drop these levels. It is possible to use more panels to partly compensate for this, but your charge
controller will need to limit charging current on sunny days. Bruce Roe

[Brian53713]

In Desperate conditions, where your life depends on it you're going to want those panels ground-mounted, easily moved to track all of the available hours of Sun. My best day last summer 200 watts of panel, 1.8 kilowatt, therefore 9 hours of sun it seems like.

[jflorey2]

almost all 250 watt of each panel ...total will be 500 watt and high current will pass to my batteries

1) You won't get 500 watts out of that system. You will be fortunate to get 400 watts in direct sun.
2) You won't get 400 watts for much of the day. Power will vary as the angle changes. Below is an example. Note at the peak they are getting about 70% of the rated power of the system, and only for an hour or so.

[ButchDeal]

hi people

looks like i am lucky with this one ....one of my batteries i saw it cleary as shown in picture ...it was AGM that mean now i can do the following


i do have 2 100A12V total of 200 12 volt batteries

currently charging them with a 250 watt panel and the rule of 10 hours still holds


but i am happy that they can accept 500 watt panel ...that will allow me to charge them IN 5 hours time since 500*5 is 2500 watt

and that is the amount of power in my 200*12 =2400 watt batteries


5 hours time is really accpetable

So you expect a 250 watt module to generate 250 watt/hours every hour for 5 hours every day.
thats cute.

[gendil]

here is the sticker of my panel which shows it abilities power is 250 ....now all i have to do is to buy another one and change my controller to mppt which pretty sure will draw

almost all 250 watt of each panel ...total will be 500 watt and high current will pass to my batteries

they will charge in 5 hours of time

the nice side of this is that if my betteries are full charged and out there there is nice sun >>>>>(plenty of sun in libya ...but plenty of black outs ..country in war ...that is

why i am concerned with fully charging my batteries in quick time ......we are in situation of LIFE ON ISLAND where we have to manage our power need on our own )>>>>>>>.



back to subject ...if we have good sun i can run many loads that are under the 500 watt since batteries will not be discharged because most of the charge is coming directly from sun


that willl do alot to me and my difficult life ....like running clothe washing machine some time running the refrigerator as long as sun is strong ...this will freeze the foods

in my fridge-freeze ....will keep the food in good condition till the next day ...next sun shine and ....5 hours of batteries charge

once they are full ... i can then use fridges etc rest of the day depending on solar power ....batteries will only be used as BUFFER

WHERE clould can pass temporarily and solar energy generation reduced a bit ....


am i Right on this thoughts ? ....thanks for help...need more help ....i am in LIFE ON ISLAND situation where i must make "MOST " of my system


thanks for all



(note : we do have around 7 hour of sun in winter and more than 10 hours of sun in summer ...the concern is to harvest it quickly ..charge batteires quickly ...and enjoy 2 hours of free sun power in winter 7-5 =2 hours and enjoy 5 hours of free power in summer 10-5 =5 hours ....the 5 hour is the charging time ...)

[gendil]

hi people

looks like i am lucky with this one ....one of my batteries i saw it cleary as shown in picture ...it was AGM that mean now i can do the following


i do have 2 100A12V total of 200 12 volt batteries

currently charging them with a 250 watt panel and the rule of 10 hours still holds


but i am happy that they can accept 500 watt panel ...that will allow me to charge them IN 5 hours time since 500*5 is 2500 watt

and that is the amount of power in my 200*12 =2400 watt batteries


5 hours time is really accpetable